—You ought to have called him yesterday．
—Yes，I know I ．
| A．ought to | B．have to | C．should have | D．must have |
—Why was Professor Zhang unhappy recently？
—Because the theory he insisted on _________ wrong.
| A．proved | B．proving | C．being proved | D．was proved |
So _____ that all the living things died out gradually .
| A．serious polluted the lake is | B．serious polluted is the lake |
| C．seriously polluted the lake is | D．seriously polluted is the lake |
—Where _____Chongqing do you decide to build the factory ?
—Nobody ____our manager knows .
| A．except; besides | B．but; besides | C．but ; but | D．except; besides |
At last the two companies ____an agreement and began to trade with each other .
| A．came | B．concluded | C．arrived | D．make |
It is in this very village , ____Mary was born 35 years ago , ____she will build her first school , inspires everyone to help her .
| A．where; that ; which | B．that ; that ; that |
| C．that ; when ; which | D．where ; when ; that |